note fullermd <p> Assuming that by 'epoch time' you mean <c>time_t</c>, you don't need to convert to some other form. Since time_t is a lying liar and pretends every day is exactly 86400 seconds long, you can just do some <c>/</c>'s and <c>%</c>'s to find which fit in the same day and the highest for the day. </p> <p>(of course, because of the undefined behavior around leap seconds, you can't <em>really</em> be sure whether <c>% 86_400 == 0</c> is actually 00:00:00 or 23:59:60, but I think most systems repeat the 86399th instead. And since you can't tell anyway, it probably doesn't matter)</p> 966022 966022